Lighting device and controlling method thereof

Abstract

A lighting device is disclosed. The lighting device includes a first light emitting element having a first color temperature, a second light emitting element having a second color temperature, a communication interface, and a processor configured to, when a first user input for adjusting a brightness of the lighting device is received via the communication interface, adjust both brightness of the first light emitting element and the second light emitting element based on the first user input, when a second user input for adjusting a color temperature is received, obtain ratio information of the brightness of the first light emitting element to the brightness of the second light emitting element based on the second user input, and adjust both brightness of the first light emitting element and the second light emitting element based on the obtained ratio information.

What is claimed is: 
     
       1. A lighting device comprising:
 a first light emitting element having a first color temperature; 
 a second light emitting element having a second color temperature; 
 a third light emitting element having a third color temperature; 
 a communication interface; 
 a first switching element and a second switching element; 
 an output terminal comprising an LED positive electrode output terminal, an LED negative electrode output terminal, a first color temperature output terminal, and a second color temperature output terminal; and 
 a processor; 
 wherein the LED positive electrode output terminal is connected to a positive electrode (anode) of the first light emitting element, a positive electrode (anode) of the second light emitting element and a positive electrode (anode) of the third light emitting element, 
 wherein the first color temperature output terminal is connected to a negative electrode (cathode) of the first light emitting element, 
 wherein the second color temperature output terminal is connected to a negative electrode (cathode) of the second light emitting element, 
 wherein the LED negative electrode output terminal is connected to a negative electrode (cathode) of the third light emitting element, if the brightness is controlled only by the third light emitting element for a normal light, without the first light emitting element and the second light emitting element, 
 wherein the first switching element is disposed between the processor and the first color temperature output terminal, and the second switching element is disposed between the processor and the second color temperature output terminal,
 wherein the processor is configured to, 
 
 control both the first light emitting element and the second light emitting element for an emotional light, 
 control the third light emitting element separately from the first light emitting element and the second light emitting element for the normal light,
 when a first user input for adjusting a brightness of the lighting device is received via the communication interface, adjust both brightness of the first light emitting element and the second light emitting element based on the first user input, 
 when a second user input for adjusting a color temperature is received, obtain ratio information of the brightness of the first light emitting element to the brightness of the second light emitting element based on the second user input, and 
 adjust both brightness of the first light emitting element and the second light emitting element based on the obtained ratio information. 
 
 
     
     
       2. The lighting device according to  claim 1 , wherein the processor is configured to, when the first user input for increasing the brightness of the lighting device is received, control the brightness of the first light emitting element and the second light emitting element so as to increase both the brightness of the first light emitting element and the brightness of the second light emitting element. 
     
     
       3. The lighting device according to  claim 1 , wherein the processor is configured to, when the second user input for decreasing the color temperature is received, increase the brightness of the first light emitting element and decreasing the brightness of the second light emitting element. 
     
     
       4. The lighting device according to  claim 1 , wherein the processor is configured to,
 identify an entire supply current corresponding to the brightness of the lighting device based on the first user input, and 
 supply the identified entire supply current to the first light emitting element and the second light emitting element based on the obtained ratio information. 
 
     
     
       5. The lighting device according to  claim 4 , wherein the processor is configured to,
 identify a first current supplied to the first light emitting element and a second current supplied to the second light emitting element based on the entire supply current and the ratio information, 
 identify whether at least one of the entire supply current, the first current, or the second current is in a threshold range, and 
 when at least one of the entire supply current, the first current, or the second current is identified to be beyond the threshold range, identify that the lighting device is broken down. 
 
     
     
       6. The lighting device according to  claim 4 , wherein the processor is configured to,
 obtain a first control signal corresponding to the first color temperature based on the entire supply current and the ratio information, 
 obtain a second control signal corresponding to the second color temperature by inverting a waveform of the identified first control signal, 
 transmit the first control signal to the first light emitting element, and 
 transmit the second control signal to the second light emitting element. 
 
     
     
       7. The lighting device according to  claim 6 ,
 wherein the processor is configured to, 
 supply the first current to the first light emitting element via the first switching element based on the first control signal, and 
 supply the second current to the second light emitting element via the second switching element based on the second control signal. 
 
     
     
       8. The lighting device according to  claim 1 , further comprising:
 a red light emitting diode; 
 a green light emitting diode; and 
 a blue light emitting diode, 
 wherein the output terminal further comprises a red output terminal, a green output terminal, and a blue output terminal, 
 wherein the LED positive electrode output terminal is connected to a positive electrode (anode) of the red light emitting diode, a positive electrode (anode) of the green light emitting diode, and a positive electrode (anode) of the blue light emitting diode, 
 wherein the red output terminal is connected to a negative electrode (cathode) of the red light emitting diode, 
 wherein the green output terminal is connected to a negative electrode (cathode) of the green light emitting diode, and 
 wherein the blue output terminal is connected to a negative electrode (cathode) of the blue light emitting diode. 
 
     
     
       9. The lighting device according to  claim 1 , further comprising:
 an auxiliary power supply, 
 wherein the processor is configured to, when power of the lighting device is turned off, supply the power to the lighting device by using the auxiliary power supply.